BTW, as a European, I was surprised to find why Hershey's Kisses taste like vomit and it looks like I'm not the only one to see it this way:
http://elitedaily.com/news/hersheys-chocolate-chemical-in-vo...
http://elitedaily.com/news/hersheys-chocolate-chemical-in-vo...
Water is also found in both vomit and chocolate.
They didn't provide any quote suggesting butyrate tastes like vomit, or gives vomit its distinctive flavor - just that it provides a tang, like /all acids do/. You wouldn't say that sour butter or Parmesan taste like vomit, but those were also listed as containing butyrate.
This whole article is absolutely ridiculous.
However, if you remove them, the wine/chocolate lack their rich flavor.